Portable space heater



FIG. 1 shows a front, top and right side perspective view of a portable space heater incorporating our new design;

FIG. 2 shows an enlarged front elevational view of the portable space heater shown in FIG. 1;

FIG. 3 shows an enlarged elevational view of the portable space heater shown in FIG. 1;

FIG. 4 shows an enlarged left side elevational view of the portable space heater shown in FIG. 1.

FIG. 5 shows an enlarged right side elevational view of the portable space heater shown in FIG. 1.

FIG. 6 shows an enlarged top plan view of the portable space heater shown in FIG. 1; and,

FIG. 7 shows an enlarged bottom plan view of the portable space heater shown in FIG. 1. 

The ornamental design for a portable space heater, as shown. 